21893594080 has 96 divisors (see below), whose sum is σ = 54261627840. Its totient is φ = 8336240640.

The previous prime is 21893594033. The next prime is 21893594111. The reversal of 21893594080 is 8049539812.

It is a super-2 number, since 2×21893594080² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 296212 + ... + 362668.

It is an arithmetic number, because the mean of its divisors is an integer number (565225290).

Almost surely, 2^21893594080 is an apocalyptic number.

21893594080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21893594080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27130813920).

21893594080 is an abundant number, since it is smaller than the sum of its proper divisors (32368033760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21893594080 is a wasteful number, since it uses less digits than its factorization.

21893594080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66572 (or 66564 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 49.

The spelling of 21893594080 in words is "twenty-one billion, eight hundred ninety-three million, five hundred ninety-four thousand, eighty".